# RisshoLib vs Four Operations Math

The clearest difference is iOS requirement: RisshoLib at 11.0 against Four Operations Math's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RisshoLib ships an update weekly, Four Operations Math every 8 days. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | RisshoLib | Four Operations Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/four-operations-math/id6529530666/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | — | Free |
| Size | 40 MB | 21 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Ryutaro Iseki](https://appshunter.io/developer/1544199624) | [Romiick LLC](https://appshunter.io/developer/1716146475) |

## What reviewers say

### RisshoLib

[App page](https://appshunter.io/ios/app/rissholib/id6450135279)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Four Operations Math

[App page](https://appshunter.io/ios/app/four-operations-math/id6529530666)

This puzzle game challenges players to create mathematical equations using four numbers and basic arithmetic operations to reach a target value. It promotes logical thinking and problem-solving skills through engaging gameplay with varying challenges.

**Highlights:** Create mathematical equations, Use four numbers and operations, Achieve target values, Logical thinking development, Basic and Custom game modes, Intuitive tap and drag controls

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RisshoLib free?

RisshoLib is free to download, with no in-app purchases.

### Is Four Operations Math free?

Four Operations Math is free to download, with no in-app purchases.

### Do RisshoLib or Four Operations Math have ads?

Neither RisshoLib nor Four Operations Math shows ads.

### Which is updated more often, RisshoLib or Four Operations Math?

RisshoLib ships an update weekly, and Four Operations Math every 8 days. Most recently, RisshoLib was updated on October 10, 2026 and Four Operations Math on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*